Failure Point Detection: Fpd(269) - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

Failure Diagnosis Instructions

3-30-3 FAILURE POINT DETECTION: FPD(269)

Purpose
Ladder Symbol
Variations
Applicable Program Areas
Operands
Operand Specifications
1156
Diagnoses a failure in an instruction block by monitoring the time between
execution of FPD(269) and execution of a diagnostic output and finding which
input is preventing an output from being turned ON.
FPD(269)
C
T
R
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program areas
Not allowed OK
C: Control Word
C must be a constant between 0000 and 01FF or between 8000 and 81FF.
The following diagram shows the function of the digits in the control word.
15
C
T: Monitoring Time
T must be between 0 and 9,999 decimal (between 0000 and 270F hex). A
value of 0 disables time monitoring; values in the range of 1 to 270F set the
monitoring time from 0.1 to 999.9 seconds.
R: First Register Word
The functions of the register words are described on page 1159.
Area
CIO Area
Work Area
Holding Bit Area
Auxiliary Bit Area
Timer Area
Counter Area
DM Area
C: Control word
T: Monitoring time
R: First register word
Step program areas Subroutines
OK
12 11
FAL number: 000 to 1FF
Diagnostic output mode
0: Bit address output only (hexadecimal)
8: Bit address and message output (ASCII)
C
--- CIO 0000 to CIO 6143
--- W000 to W511
--- H000 to H511
--- A000 to A447
A448 to A959
--- T0000 to T4095
--- C0000 to C4095
--- D00000 to D32767
Section 3-30
FPD(269)
Not supported.
Not supported.
Interrupt tasks
Not allowed
0
T R
A448 to A959